Extractor for powder actuated tools



Oct. 29, 1 68 J. A. mm 3,40

EXTRACTOR FOR POWDER ACTUATED TOOLS Filed July 28, 1966 3 Sheets-Sheet 1 ill' FIG. 2.

FIG. I.

Inventor John A. Kotas H. by

Attorneys Oct. 29, 1968 J. A. KOTAS EXTRACTOR FOR POWDER ACTUATED TOOLS 3 Sheets-Sheet 2 Filed July 28, 1966 Inventor John A. Kotus Oct. 29, 1968 J. A. KOTAS I 3,407,933

EXTRACTOB FOR POWDER ACTUATED TOOLS Filed July 28, 1966 3 Sheets-Sheet 3 S i m/ ///////3%m m MN? 4 Ilthv- |H,| J v illxzwuhuhiiili l vw di |a n vv Q 3 r 4% 1 V 5. N MN. Q .3 R m\ w\ ww Inventor John A Kot Attorneys United States Patent ABSTRACT on THE DISCLOSURE A cartridge powered stud driver including an extractor slidably mounted on the barrel and positioned in a slot in said barrel so that the extractor forms a portion of the chamber. The extractor is actuated by the rearward movement of the guide tube which surrounds the barrel. The guide tube moves an action bar which carries a stud to engage and move the extractor.

This invention relates to cartridge powered stud drivers and in particular to an extractor for such tools.

A great many cartridge powered tools are made with chamber bushings which hold the cartridge during firing and which must be removed so that the fired shell can be removed. Some of these tools have studs positioned in hollow handles so the operator can force the shell out of the bushing. The tool is normally loaded by placing the bushing in the barrel and then putting an unfired cartridge in the bushing.

Other tools are manufactured with the chamber in the breech end of the barrel. The unfired cartridge is placed directly in this chamber. The operator then has to manually pick the fired she-ll out of the chamber prior to reloading.

Some tools have been designed to incorporate an extractor, but a great many tools are already in' use without extractors. This invention relates to the addition of an extractor to a tool currently in production which requires a minimum amount of revision to the tool to install.

It is, therefore, the main purpose of this invention to provide an extractor for a cartridge powered tool that was originally designed without an extractor.

A further purpose of this invention is to provide an extractor for a cartridge powered tool originally having a chamber bushing.

It is contemplated that these objectives may best be achieved by providing a new barrel grooved at the breech end to receive an extractor slidably mounted on the barrel. The extractor is actuated by rearward movement of the guide tube. The guide tube moves the action collar and action bar and the action bar engages a stud or like member on the extractor to move it rearward and extract a cartridge in the chamber.

It is to be understood that the embodiments of this invention to be disclosed below are equally applicable to all types of cartridge powered tools.

Other objects and advantages of this invention will become apparent as the following description proceeds and the features of novelty which characterize this invention will be pointed out with particularity in the claims annexed to and forming part of this specification.

In the drawings:

FIGURE 1 is a side elevation view partially in section of a cartridge powered tool incorporating the present invention;

FIGURE 2 is a side elevation view of the barrel assembly of a cartridge powered tool incorporating the present invention;

FIGURE 3 is a side elevation view of the barrel assembly of a cartridge powered tool incorporating the "ice present invention and showing the guide tube in the readyto-fire position;

FIGURE 4 is a side elevation view of the barrel assembly of a cartridge powered tool incorporating the present invention and showing the extractor fully actuated;

FIGURE 5 is a' side elevation view of the tool showing the tool in the open position; and

FIGURE 6 is a longitudinal sectional view taken through FIGURE 2 showing the details of the instant invention.

Referring to the drawings it can be seen that the powder actuated tool shown incorporating the instant invention has a cover 1 and a housing 2. These two portions or sections are locked together by means of a latch 3 which is slidably mounted on housing 2. Cover 1 and housing 2 are pivotally hinged together by means of a bolt 4.

Housing 2 contains a fire control mechanism which does not constitute any part of the present invention and is not shown. A breech member or breech cover 5 closes the end of housing 2. Cover 5 is arranged to close over the end of barrel 6 when cover 1 and housing 2 are in the closed position.

In order to provide a positive lock to hold cover 1 and housing 2 in the closed position during firing a slot 7 is formed in cover 1 to receive latch 3. A button 8 is mounted in the underside of housing 2 which can be depressed and its extension will then lift latch 3 out of slot 7 so that housing 2 and cover 1 can be swung open.

Mounted within cover 1 is a barrel assembly 9 which includes barrel 6. Set screws (not shown) thread into cover 1 and retain barrel assembly 9 in cover 1. Assembly 9 also includes an action tube 10, an action bar 11, a washer 12, action spring 13, collar 14 and piston 15. Barrel 6 is formed with a chamber 16 to receive a cartridge and an extractor 17 is positioned in an opening 18 in barrel 6 adjacent chamber 16.

Reference should now be made to FIGS. 2, 3 and 4, wherein barrel assembly 9 is shown with extractor 17 and action or guide tube 10 in their various positions before, during and after firing the tool. In the normal position the action of spring 13 forces collar 14 toward the muzzle end of barrel 6. Spring 13 is retained between washer 12 and collar 14 and exerts its force on collar 14 due to the fact that washer 13 is positioned against a shoulder 19 formed on barrel 6. Action bar 11 is secured to collar 14 by welding or any other suitable means and is thereby moved by collar 14.

Action tube 10 is formed with a groove 20 into which extends the end of set screw 21 so that while tube 10 is retained in cover 1 it is free to move rearward in tube 10. The end of tube 10 near the breech abuts collar 14 so that pressing of the muzzle end of tube 10 compresses spring 13 as collar 14 moves rearward. A screw 22 is positioned in action bar 11 and extends through bar 11 into a slot 23 in extractor 17. By referring to FIGURE 1 it can be seen that that screw 21 retains tube 10 in cover 1 while allowing tube 10 to move rearward due to the location and size of slot 20 into which screw 21 projects. This arrangement allows rearward movement of action bar 11 so that screw 22 will move into contact with the rear of slot 23 as shown in FIGURE 6 carrying extractor 17 rearward to extract a cartridge in chamber 16. Reference should now be made to FIGURE 6 wherein it can be seen that tube 10 is slidably mounted over barrel 6 and is part of barrel assembly 9 which includes those elements previously set forth as well as a barrel extension 24, coupling 25 and a buffer 26. Tube 10 slides over the barrel assembly from the muzzle end and abuts collar 14. It can be seen that barrel extension 24 and coupling 25 are enclosed completely by tube 10. Buffer 26 is included to protect the tool if a no work short is made, that is, the

tool is not against a work surface when fired. Extension 24 has a smaller diameter than barrel 6 so as to retain piston 15 in the tool. It can be seen therefore that movernent of action bar 11 causes movement of extractor 17.

Reference should again be made to FIG. 2, wherein barrel assembly 9 is shown in the normal position. At this time tube 10 is biased forward by the action of spring 13 and collar 14. This action also biases bar 11 forward so that extractor 17 is within opening 18 in barrel 6 and forms a portion or segment of chamber 16. In order to fire the tool the muzzle end of tube 10 is pressed against a work surface compressing spring 13 by causing collar 14 to move rearward. Movement of collar 14 causes bar 11 to move rearward and cock the firing pin contained in the fire control positioned in housing 2. Screw 22 carried by bar 11 moves rearward in slot 23 in extractor 17 but is restrained from moving extractor 17 rearward due to extractor 17 being held in position by breech member 5. This ready-to-fire position of barrel assembly 9 is shown in FIG. 3.

In order to provide means to open the tool breech cover is formed with an opening as shown in FIGURE 5 to receive the end of barrel 6 in a sliding engagement. When button 8 is pressed, this action lifts latch 3 out of slot 7 formed in cover 1 allowing the operator to rotate cover 1 and housing 2 away from one another about bolt 4. This rotating action slides the breech end of barrel 6 containing chamber 16 out of engagement with the opening formed in breech cover 5. This opening, as can be seen in FIGURE 5, is formed to receive the breech end of barrel 6 when the tool is closed but to allow the barrel 6 to freely slide out of the opening when the tool is opened by the operator.

In FIG. 4 barrel assembly 9 is shown in the cartridge extraction position. After the tool is fired button 8 is depressed lifting latch 3 out of slot 7 and cover 1 and housing 2 are swung apart exposing the breech end of barrel 6. At this time the operator grasps tube and moves it rapidly to the rear. At this time extractor 17 is free to move rearward and is so moved as scew 22 engages the end of slot 23 causing extactor 17 to move rearward of 4 barrel 6. This movement removes the fired case of a cartridge contained in chamber 16.

While the present invention is shown incorporated in a stud driver it should be understood that it can be used in other types of cartridge powered tools having action bars movde by placing the tool against a work surface.

What is claimed is: Q

1. An extractor system 'for a powder actuated tool comprising an extractor attached to the barrel of said tool adjacent said breech end, said extractor positioned to engage the head of a cartridge positioned in the chamber formed in the breech end of said barrel, an action bar movably mounted outside said barrel and biased toward the muzzle end of said barrel, a member mounted on said action bar to engage said extractor and an action tube surrounding said barrel adjacent said muzzle end in engagement with said action bar whereby movement of said action tube toward said breech end of said barrel causes said action bar to move and carry said extractor past the breech end of said barrel to remove a cartridge positioned in said chamber.

2. The invention set forth in claim 1, wherein said biasing of said action bar is provided by an action spring mounted on said barrel between a washer positioned on said barrel adjacent the breech end thereof and a collar carrying said action bar and mounted on said barrel adjacent said action tube.

3. The invention set forth in claim 1, wherein said extractor forms at least a portion of said chamber.

References Cited UNITED STATES PATENTS 2,645,772 7/1953 Walker 227-8 2,705,323 4/1955 Bossong 227-11 2,995,753 8/1961 Henning 227-9 3,341,101 9/1967 Butler 2278 WILLIAM W. DYER, IR., Primary Examiner.

R. L. FARRIS, Assistant Examiner. 

